The invention relates to a retreat-preventing device for a tube sheet of a tube push bench and an application method thereof. The retreat-preventing device comprises counter-force racks, connecting plates and jacks, wherein the counter-force racks are fixed to a launch shaft base and are arranged on two sides of a hole excavated by the tube push bench, and the counter-force racks are provided withmounting faces opposite to a section excavated by the tube push bench; the connecting plates are detachably mounted on two sides of the tube sheet at the hole, and the connecting plates are located between the mounting faces and the section excavated by the tube push bench; and the jacks, corresponding to the connecting plates, are vertically mounted on the mounting faces, the jacks are electrically connected to controller sensors, and displacement changes of jack nodes of the jacks are induced by the sensors, so that controllers adjust thrusts acted to the connecting plates till the jackingnodes of the jacks no longer displace, so that the tube sheet is prevented from retreating. The retreat-preventing device solves the problem that the push tube is hard to prevent retreat in a deeply buried large push tube project effectively, can adjust the thrust of the retreat-preventing device precisely to keep balance of the thrust and the pressure of a soil surface so as to prevent aggravation of surface subsidence, so that the construction quality and the construction efficiency are improved.